Dargo seems to like riding the current from the filter. Every now and then he slowly edges up to where the water comes out of the filter and then darts into the current, rides it down and circles around to do it again.
He seems to enjoy it and the current isn't very strong, so hopefully it doesn't hurt him.
pfsh I'm jealous! Pez HATES the filter, and light...but he's getting better about that one lol. No but I even tried baffling the filter today and he just cowered in the corner...:/ so I'm stuck with constant water changes! ooohhh weell! I bet that's really cute though! Your betta is soo pretty with his tail and eyes...:)